2013年夏季长江中游持续高温与南海对流异常影响  

Effect of Convection over the South China Sea on High Air-Temperature in Mid-Reaches of Yangtze River during Summer 2013

作　　者：孙雅文[1] 傅刚[1] 孙即霖[1] 时晓曚 

机构地区：[1]中国海洋大学物理海洋教育部重点实验室,海洋-大气相互作用实验室,山东青岛266100 [2]青岛市气象局,山东青岛266101

出　　处：《海洋湖沼通报》2016年第3期1-7,共7页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金(41276012)资助;高等学校博士学科点专项科研基金(20110132110017)资助

摘　　要：利用NCEP再分析资料中气温、位势高度、OLR、风场等资料,分析了2013年夏季长江中游地区持续高温天气发生的原因。研究发现:造成2013年长江中游地区持续高温天气的原因与下游地区持续高温天气的主要原因并不完全相同。相关分析和大气环流模式实验结果表明,南海上空异常对流的增强与长江中游持续性高温天气的发生具有更密切的关系。南海上空异常对流加热激发遥相关波列使长江中游地区大气中出现异常反气旋环流,导致下沉运动增强,而长江下游的高温天气主要与菲律宾海附近上空的异常对流活动相联系。南海对流活动的异常加强与南半球通过热带东印度洋向北跨赤道的气流异常增强存在密切的联系。The persistent high air-temperature occurred in mid-reaches of Yangtze River during summer 2013 was investigated using NCEP/NCAR reanalysis data. It is found that the enhanced convection o- ver the South China Sea is responsible for the abnormal higher air-temperature in mid-reaches of Yan- gtze River through correlation analysis and numerical experiment by IAP9 atmospheric general circula- tion model. Abnormal convection heating over the South China Sea stimulates a wave train to cause a- nomalous anticyclonic circulation in mid-reaches of Yangtze River and to enhance subsidence movement. But in lower reaches of Yangtze River, the high temperature is associated with abnormal convection ac- tivities over ocean near the Philippines. It is worth noting that the enhanced convection over the South China Sea may stimulated bv cross-eouator stream from Southern Indian Ocean

关 键 词：2013年 长江中游 持续性高温 南海上空 异常对流 

分 类 号：P466[天文地球—大气科学及气象学]